I have recently setup Discourse and on top of that setup Mailgun as the email sending tool. This being said everything is done right in terms of DKIM, SPF, etc. I am even getting a 8.5/10 from http://www.mail-tester.com
However when I go to admin > email > settings and send out a test email to myself (Gmail) it goes directly to my Spam folder.
How can I prevent this from happening for myself and my customers?